2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-22 20:23:57 +08:00
linux-next/net/sched
Paolo Valente 9b99b7e90b pkt_sched: sch_qfq: properly cap timestamps in charge_actual_service
QFQ+ schedules the active aggregates in a group using a bucket list
(one list per group). The bucket in which each aggregate is inserted
depends on the aggregate's timestamps, and the number
of buckets in a group is enough to accomodate the possible (range of)
values of the timestamps of all the aggregates in the group. For this
property to hold, timestamps must however be computed correctly.  One
necessary condition for computing timestamps correctly is that the
number of bits dequeued for each aggregate, while the aggregate is in
service, does not exceed the maximum budget budgetmax assigned to the
aggregate.

For each aggregate, budgetmax is proportional to the number of classes
in the aggregate. If the number of classes of the aggregate is
decreased through qfq_change_class(), then budgetmax is decreased
automatically as well.  Problems may occur if the aggregate is in
service when budgetmax is decreased, because the current remaining
budget of the aggregate and/or the service already received by the
aggregate may happen to be larger than the new value of budgetmax.  In
this case, when the aggregate is eventually deselected and its
timestamps are updated, the aggregate may happen to have received an
amount of service larger than budgetmax.  This may cause the aggregate
to be assigned a higher virtual finish time than the maximum
acceptable value for the last bucket in the bucket list of the group.

This fix introduces a cap that addresses this issue.

Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Reviewed-by: Fabio Checconi <fchecconi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-06 02:47:05 -05:00
..
act_api.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_csum.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_gact.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_ipt.c net: Add skb_unclone() helper function. 2013-02-15 15:10:37 -05:00
act_mirred.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_nat.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_pedit.c net: Add skb_unclone() helper function. 2013-02-15 15:10:37 -05:00
act_police.c act_police: improved accuracy at high rates 2013-02-12 18:59:45 -05:00
act_simple.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
act_skbedit.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_api.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_basic.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_cgroup.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_flow.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_fw.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_route.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_rsvp6.c
cls_rsvp.c
cls_rsvp.h pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_tcindex.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
cls_u32.c pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
em_canid.c net: em_canid: Ematch rule to match CAN frames according to their identifiers 2012-07-04 13:07:05 +02:00
em_cmp.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_ipset.c net: sched: add ipset ematch 2012-07-12 07:54:46 -07:00
em_meta.c net: use a per task frag allocator 2012-09-24 16:31:37 -04:00
em_nbyte.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_text.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_u32.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
ematch.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
Kconfig net: sched: enable CAN Identifier to be build into kernel 2012-11-25 16:06:06 -05:00
Makefile net: sched: add ipset ematch 2012-07-12 07:54:46 -07:00
sch_api.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sch_atm.c sch_atm.c: get rid of poinless extern 2012-06-01 10:37:18 -04:00
sch_blackhole.c pkt_sched: Add qdisc->ops->peek() implementation. 2008-10-31 00:45:55 -07:00
sch_cbq.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sch_choke.c net: sched: factorize code (qdisc_drop()) 2012-05-04 11:50:05 -04:00
sch_codel.c fq_codel: should use qdisc backlog as threshold 2012-05-16 15:30:26 -04:00
sch_drr.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sch_dsmark.c net: sched: factorize code (qdisc_drop()) 2012-05-04 11:50:05 -04:00
sch_fifo.c pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sch_fq_codel.c fq_codel: dont reinit flow state 2012-09-03 14:36:50 -04:00
sch_generic.c sch: make htb_rate_cfg and functions around that generic 2013-02-12 18:59:45 -05:00
sch_gred.c net_sched: gred: actually perform idling in WRED mode 2012-09-13 16:10:13 -04:00
sch_hfsc.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sch_htb.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sch_ingress.c net_sched: factorize qdisc stats handling 2011-01-10 16:07:54 -08:00
sch_mq.c pkt_sched: avoid requeues if possible 2012-12-12 00:16:47 -05:00
sch_mqprio.c pkt_sched: avoid requeues if possible 2012-12-12 00:16:47 -05:00
sch_multiq.c pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sch_netem.c netem: fix delay calculation in rate extension 2013-01-29 15:43:02 -05:00
sch_plug.c net_sched: sch_plug: plug_qdisc_ops is static 2012-02-13 16:04:40 -05:00
sch_prio.c pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sch_qfq.c pkt_sched: sch_qfq: properly cap timestamps in charge_actual_service 2013-03-06 02:47:05 -05:00
sch_red.c pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sch_sfb.c sch_sfb: Fix missing NULL check 2012-07-12 08:33:18 -07:00
sch_sfq.c pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sch_tbf.c tbf: improved accuracy at high rates 2013-02-12 18:59:45 -05:00
sch_teql.c sch_teql: Convert over to dev_neigh_lookup_skb(). 2012-07-05 01:09:06 -07:00